Citada por|
| US4300864 | 5 Dic 1979 | 17 Nov 1981 | Angleboard Inc. | Freestanding honeycomb load spacer | | US4349303 | 13 Sep 1979 | 14 Sep 1982 | Angleboard Inc. | Load spacer | | US5062751 | 13 Mar 1991 | 5 Nov 1991 | Shippers Paper Products Company | Economy void filler | | US5171114 | 25 Jul 1991 | 15 Dic 1992 | Union Camp Corporation | Expandable load spacer |
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